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Titolo:
INTERMEDIATE-MASS MUON PAIR CONTINUUM IN PB-PB COLLISIONS AT 158 GEV C/
Autore:
ABREU MC; ALEXA C; ALESSANDRO B; ASTRUC J; BAGLIN C; BALDIT A; BELLAICHE F; BEDJIDIAN M; BEOLE S; BORHANI A; BOLDEA V; BONAZZOLA G; BORDALO P; BUSSIERE A; CAPONY V; CASTOR J; CERU M; CHAMBON T; CHAURAND B; CHEVROT I; CHEYNIS B; CHIAVASSA E; CICALO C; CONSTANTINESCU S; DABROWSKI W; DEFALCO A; DELLACASA G; DEMARCO N; DEVAUX A; DITA S; DRAPIER O; ESPAGNON B; FARGEIX J; FLEURET F; FORCE P; GALLIO M; GAVRILOV YK; GERSCHEL C; GIUBELLINO P; GOLUBEVA MB; GONIN M; GORODETZKY P; GROSSIORD JY; GUAITA P; GUBER FF; GUICHARD A; HAROUTUNIAN R; IDZIK M; JOUAN D; KARAVITCHEVA TL; KOSSAKOWSKI R; KLUBERG L; KUREPIN AB; LEBORNEC Y; LANDAUD G; LOURENCO C; LUQUIN L; MACCIOTTA P; OHLSSONMALEK F; MARZARICHIESA A; MASERA M; MASONI A; MOURGUES S; MUSSO A; PETIAU P; DASILVA WLP; PICCOTTI A; PIZZI JR; PUDDU G; RACCA C; RAMELLO L; RAMOS S; RATOMENDES P; RICCATI L; ROMANA A; SARTORI MS; SATURNINI P; SCOMPARIN E; SHAOIAN R; SILVA S; SERCI S; SONDEREGGER P; TARRAGO X; TEMNIKOV P; TOPILSKAYA NS; USAI G; VERCELLIN E; WILLIS N;
Indirizzi:
LIP P-1000 LISBON PORTUGAL LAPP,CNRS,IN2P3 F-74019 ANNECY LE VIEUX FRANCE IFA R-76900 BUCHAREST ROMANIA UNIV CAGLIARI,IST NAZL FIS NUCL I-09127 CAGLIARI ITALY UNIV CLERMONT FERRAND,LPC CLERMONT FERRAN FRANCE CERN CH-1211 GENEVA 23 SWITZERLAND RUSSIAN ACAD SCI,INST NUCL RES MOSCOW 117312 RUSSIA UNIV PARIS 11,IPN F-91406 ORSAY FRANCE CNRS,IN2P3 F-91406 ORSAY FRANCE ECOLE POLYTECH,LPNHE F-91128 PALAISEAU FRANCE CNRS,IN2P3 F-91128 PALAISEAU FRANCE CTR RECH NUCL,CNRS,IN2P3 F-67037 STRASBOURG FRANCE UNIV STRASBOURG 1 F-67037 STRASBOURG FRANCE UNIV TURIN,IST NAZL FIS NUCL I-10125 TURIN ITALY UNIV LYON 1,IPN F-69622 VILLEURBANNE FRANCE CNRS,IN2P3 F-69622 VILLEURBANNE FRANCE
Titolo Testata:
Nuclear physics. A
, volume: 610, anno: 1996,
pagine: 331 - 341
SICI:
0375-9474(1996)610:<331:IMPCIP>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
11
Recensione:
Indirizzi per estratti:
Citazione:
M.C. Abreu et al., "INTERMEDIATE-MASS MUON PAIR CONTINUUM IN PB-PB COLLISIONS AT 158 GEV C/", Nuclear physics. A, 610, 1996, pp. 331-341

Abstract

The NA50 experiment measures, at CERN SPS, the dimuon production in Pb-Pb collisions at 158 GeV/c incident momentum. In this paper an analysis of the intermediate mass region (1.5 less than or equal to M(mu mu)12.5 GeV/c(2)) is presented. Known dimuon sources in this interval ofthe spectrum are the e.m. annihilation of <q(q)over bar> pairs (i.e, Drell-Yan) and the semileptonic decay of charmed hadrons. The contribution of these processes is calculated by means of a fit to the measured invariant mass distribution (for Drell-Yan) and of a linear extrapolation of p-A experimental results obtained by NA38 (for charm). It will he shown that known sources do not account for all of the dimuon yield measured by NA50, i.e, an excess is observed. The size of the excess measured in Pb-Pb is larger than the one seen by NA38 in S-U collisions. The centrality dependence of this effect, both in S-U and Pb-Pb, is also discussed.

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Documento generato il 27/11/20 alle ore 13:45:15